lan tester circuit

This LAN tester circuit originally designed by Vassilis Stergiopoulos. This LAN tester circuit optionally has two designs. The first design is built based 2 main ICs that are timer IC555 and decade counter 4017. The second design is based microcontroller chip ATtiny2313 (the other kind of microcontroller should be work). The first design circuit (
lan tester circuit - schematic

555. Here the circuit diagram of DC battery tester designed by Matthew B. This circuit can be used to measure DC battery from 1. 5V up to 9V. Component Parts List: R1 = 18K Ohm R2 = 240 Ohm R3 = 8. 2K Ohm R4 = 3K Ohm R5 = 10 Ohm M1 = Panel Meter (Anyone will. Here is the remote control tester circuit. This circuit is really a simple and easy tester for verifying the basic operations of an infrared remote control unit. It is low-cost and very easy to construct. The tester is designed around infrared receiver module TSOP1738. Operation of the remote control is identified by a tone from. Here the low resistance connection tester which can be used as cable or wire tester, soldered joints and other types of connection with resistance value between 0. 25 and 4 ohm. Notes This simple circuit uses a 741 op-amp in differential mode as a continuity tester. The voltage difference between the non-inverting and inverting inputs is. Flame, gas and smoke detector for fire alarm. You can combine this circuit with alarm circuit. The output will be the relay which switch on and switch off the alarm. Schematic diagram: The list of components needed: Download include the explanation of the circuit: Download link A Many security systems use a closed loop of wires and switches arranged so that whenever a door or window is opened, the loop will be broken and the alarm will sound. An obvious problem is that someone can tamper with the system,...

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